RA
Vishay Sfernice
Adjustable Wirewound Enamelled Resistors
FEATURES
• 21 Watt to 180 Watt at 25°C
• NF C 93-214
- RBA 13 x 70
- RBA 20 x 117
- RBA 25 x 168
”B” Ring
The ceramic tubular core ensures high dissipation capacity and excellent resistance to thermal shock and overload. The resistor
winding is evenly coiled on the core and protected by an enamel coating. A longitudinal opening provides for one or more
electrical connections by means of sliding collars equipped with a tongued connector.
DIMENSIONS in millimeters
DIMENSIONS in millimeters
16 x 94 20 x 117 25 x 138
13 x 70
25 x 168 30 x 250
AN-B-CS AN-B-CS
RA MODEL
WELDED STAINLESS STEEL 304 L BAND “B”
Connection
AN-B
94
AN-B
117
23
AN-B-CS
138
AN-B*
A
2
70
168
28
250
33
Ø B max.
Ø C min.
D
19.5
9
28
16
A
K
Ø4.2
5
9
12
12
17
F
4
5
°
17.5 0.5 21 0.7 23.5
1
16 0.5
23.5
1
26
1
+ 0.5
E
F
8
12
–
8
14
–
8
15
7
10.5
–
8
15
8
+ 0
D
O
+ 0.5
18
30
30
+ 0
H
1
27
27
J max
K max
23
29.5
–
25
31.5
–
27.5
34
19.5
24
27.5
34
ØC
ØB
E
36.5
317
- 0
L
199
–
229
- 4
M
N
O max
78
2
98
2
117
2
56
2
147
2
227 2.5
287
WELDED STAINLESS STEEL 304 L COLLAR “AN” TYPE 1
- 0
–
28
–
–
33
–
169
38.5
50
–
199
38.5
50
- 4
24.5
43.5
60
M
P
Q
R
S
T
U
V
X
1.5
0.5
–
–
ØS
–
–
24
24
25
ØC
26.5 0.5 31 0.7 33.5
1
1
24 0.5
4.2
33.5
1
1
36
5.7
1
R
V
4.2
6.35
–
4.2
6.35
–
5.7
9
5.7
9
X
6.35
–
13
9
0.5
6.5
6.5
ØB
21 0.5 24 0.7 28.5
20 0.5
28.5
33
1
T
Z
38
1
42
1
51 1.5
34.5
3.5
40
1
51 1.5 55 1.5
A
Z approx
Average unit
weight in g
5
6
6
6
5
70
116
200
225
415
SCREWED STAINLESSSTEEL304 L “CS” TYPE 1
*Also with CS and CR collars. See RW data sheet.
A
P
H
ØB
26
Q
L
15
N
U
Document Number: 50019
Revision12-Jan-04
www.vishay.com
67
For technical questions, contact sfer@vishay.com